OSG Screw Thread Insert STI Tap: Spiral Fute, 5/16"-18 UNC, H4 / 2B-3B, 3 Flute
The OSG Screw Thread Insert STI Tap (MPN 0146501) is a spiral-flute tap for steel and stainless steel, sized 5/16"-18 UNC with an H4 / 2B-3B tolerance and a bottoming chamfer. It features 3 flutes, designed for…
SKU 3G-OTH-244247
Local availability & support — Singapore
- Local office
- 20 Woodlands Link #09-05, Singapore 738733
- Phone
- +65 8878 8355
- Delivery
- Same-day or next-business-day delivery within Singapore for in-stock items; 7–14 days for factory-order parts from Europe.
- Payment
- Invoicing in SGD. PayNow, bank transfer, and corporate PO accepted.
- Ships to
- Singapore
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Product Description
The OSG Screw Thread Insert STI Tap (MPN 0146501) is a spiral-flute tap for steel and stainless steel, sized 5/16"-18 UNC with an H4 / 2B-3B tolerance and a bottoming chamfer. It features 3 flutes, designed for threading holes that will accept screw thread inserts. 3G Electric interprets your demand for this precision tool, sourcing it from our global network across 14 industrial departments — with specialist depth in cutting tools and fastening solutions.
Frequently Asked Questions
What is an OSG spiral-flute STI tap used for?
An OSG spiral-flute STI tap is used to cut internal threads in steel and stainless steel for screw thread inserts. The spiral flute design evacuates chips upward, making it ideal for blind-hole applications. This tap produces threads that accept helical coil inserts, restoring or strengthening threaded holes in industrial components.
What are the specifications of the OSG 0146501 STI tap?
The OSG 0146501 is a screw thread insert STI tap with spiral flute, size 5/16"-18 UNC, H4 / 2B-3B tolerance, 3 flutes, and bottoming chamfer. It is designed for threading steel and stainless steel. The H4 / 2B-3B designation ensures precise fit for insert installation.
Where to buy OSG taps in worldwide?
You can source OSG taps worldwide through 3G Electric, a global industrial equipment distributor. We handle full logistics, customs clearance, and delivery to your location. Contact us for availability and lead time on the OSG 0146501 STI tap. We supply genuine OSG tooling for manufacturing and maintenance operations.
How to select the correct STI tap size for a 5/16"-18 UNC insert?
To select the correct STI tap for a 5/16"-18 UNC insert, use a tap marked STI with the same thread size and pitch. The OSG 0146501 is a spiral-flute STI tap with H4 / 2B-3B tolerance, designed for steel and stainless steel. Ensure the tap chamfer matches your hole type: bottoming for blind holes, plug for through holes.
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3G Electric supplies OSG spiral-flute sti taps for steel & stainless steel. We supply genuine products with in-stock availability on common SKUs, technical documentation, commissioning support, and warranty service — worldwide.
